User's Manual

must be shielded from moisture, such as rain, and excessive temperatures. The

operating temperatures should be between -20 °C and 50 °C.

2.6.1 Turn-On Procedure

Verify all RF connectors are tightened and cables and antennas are secured.

Connect AC/DC Adaptor on the bi-directional amplifier’s DC IN connector. The

Power indicator LED should be green. Make sure that no other LED is illuminated.

If any other LED is lit, consult the trouble shooting page of this manual, or “2.6.2

Antenna Isolation and Alignment” section.

2.6.2 Antenna Isolation and Alignment

USHR-800 is equipped with an over drive protection circuit. If the output power

level of reverse path(=Up Link) exceeds prescribed limit, then reverse path is

disconnected and the FAIL LED (RED) is on. Bi-directional amplifier

automatically checks output power level every 1 minute of a 5 minute cycle when

reverse path has over power . If reverse path still exceeds level then shut down

mode continues for another 10 minutes. After 10 minutes, reverse path is switched

on again and it checks output power level again. (Repeats the process)

A. Antenna Alignment

If you are triggering the overdrive alarms at any point, try to increase the isolation

between the antennas by relocating them. The indoor antenna should be placed

physically as far away from the outdoor antenna as practical. If the geometry of the

intended coverage area allows it, you should also try the indoor antenna in such

way that interference between the antennas is at the minimum. If you are using

directional antennas, try to find a location for the indoor antenna where it can cover

the needed area and oriented back to back with respect to the outdoor antenna.

2.7 Connectors

Figure 2-7 shows the connectors and Table 2-7 provides a description of each

connector on the USHR-800 unit

Label Description

DC IN

Connect AC/DC Adaptor for supplying DC power to the

unit

TO BASE

SMA-type female connector transmits base station RF,

receives mobile RF, and connects to the outdoor antenna

TO MOBILE

SMA-t

e female connecto

transmits mobile RF,